Three main kinds of underwater wireless communication, which employ acoustic waves, radio frequency and optical waves, have attracted intensive research interests in recently years. Among them, the underwater optical wireless communication (UOWC) is characterized by high propagation speed and large transmission bandwidth. But, the optical waves in underwater environment are significantly affected by absorption and scattering effects, which limit their transmission range. In order to enhance the performance of UOWC, designing a transmission and energy efficiency routing algorithm has become a non-ignorable issue in UOWC. In this paper, a transmission distance adaptive dual-hop (TDAD) routing algorithm is proposed for underwater optical wireless networks (UOWNs) to improve their efficiency in packet-delivery and energy-consumption. Unlike the existing routing algorithms designed for UOWNs, which pre-set the transmission range of network nodes, the proposed TDAD algorithm adaptively selects the transmission range for each node according to the diversity of heterogeneous service requests and employs location and energy information in its dual-hop based routing procedure. Simulation results indicate that the proposed TDAD algorithm remarkably improves packet delivery rate with more balanced energy consumption when compared to the deviation angle-based single-hop (DAS) algorithm and the distributed sector-based (DS) routing algorithm.

中文翻译：

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水下光无线网络距离自适应双跳路由算法


近年来，利用声波、射频和光波的三种主要水下无线通信引起了人们的广泛研究兴趣。其中，水下光无线通信（UOWC）具有传播速度高、传输带宽大的特点。但是，水下环境中的光波受到吸收和散射效应的显着影响，限制了其传输范围。为了提升UOWC的性能，设计传输和能效路由算法已成为UOWC中不可忽视的问题。本文提出了一种用于水下光无线网络（UOWN）的传输距离自适应双跳（TDAD）路由算法，以提高其数据包传递和能耗效率。与现有的为UOWN设计的路由算法预先设定网络节点的传输范围不同，所提出的TDAD算法根据异构服务请求的多样性自适应地选择每个节点的传输范围，并在其双重网络中利用位置和能量信息。基于跳的路由过程。仿真结果表明，与基于偏差角的单跳（DAS）算法和分布式基于扇区（DS）的路由算法相比，所提出的TDAD算法显着提高了数据包传输率，且能耗更加均衡。